automatic gas detecting alarm circuit usb powered

Discussion in 'The Projects Forum' started by ariyalai, Nov 13, 2010.

  1. ariyalai

    Thread Starter New Member

    Nov 13, 2010
    3
    0
    hi
    Can anyone please help me I woul like to design a usb powerd autamatic gas detection alarming system, it should work like this when gas level(lpg or any gas )is normal
    it should not make any sound if the gas level increase(ppm) it should give an early signal if the gas level goes high it should activate the alariming buzzer.Can any one help me to do this circuit please.

    thanks
    looking fowar your reply.
     
  2. retched

    AAC Fanatic!

    Dec 5, 2009
    5,201
    312
    Have you selected a gas sensor yet?

    This may be easier than you think.

    Take a look at the TGS2610
    http://www.nano2.nl/info/2610.pdf

    It is an inexpensive LP gas sensor. Very easy to use.

    That, a powersupply, a buzzer and a comparator and you are in business. ;)

    (and a handful of passives)
     
    ariyalai likes this.
  3. bertus

    Administrator

    Apr 5, 2008
    15,646
    2,345
    Hello,

    The report button [​IMG] is NOT for asking questions.
    It is only for reporting spam and other unwanted stuff on the forum.

    Bertus
     
  4. PackratKing

    Well-Known Member

    Jul 13, 2008
    850
    215
    I'd have to look up my literature and give a brand name.......... I lucked across an "inventory clearance" which yielded a custom-made explosive gas detector, brandy-new inna box. The detector itself, was stepped down with a trans. of its own from outlet 120vac power. A provision for the usb circuit would have to be engineered into the system.......


    after proving that it worked, I liberated the circuit from its original casing, installed it into an Apple "gold brick" power supply box, with an adequate second transformer/rectifier circuit to power a 2" sq. 12v cpu fan, to pull an air sample past the sensor element.

    I do a lot of LP / Natural conversions of heating equipment and gas-grills on my job, and it hasn't missed a leak yet.
     
    Last edited: Nov 14, 2010
  5. ariyalai

    Thread Starter New Member

    Nov 13, 2010
    3
    0
    Can you please give me any working circuit pcb and schematic digram plz.
     
  6. blueroomelectronics

    AAC Fanatic!

    Jul 22, 2007
    1,758
    98
    What happened to "I woul like to design a usb powerd autamatic gas detection alarming system"?
    Sounds more like you want one of us to do your school assignment.
     
  7. ariyalai

    Thread Starter New Member

    Nov 13, 2010
    3
    0
    no, please help me only get the circuit
     
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